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(11) | EP 1 043 596 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Pulse width detection |
| (57) A semiconductor circuit is provided including circuitry for producing a pulse. A
plurality, n, of delay elements are provided each enabled and disabled in parallel
by the pulse. Each delay element is adapted to transmit the pulse from an input to
an output, with the pulse reaching the respective outputs at different times. A plurality,
n-1, of detectors is provided each having an input coupled to an input of a corresponding
delay element. Each detector is adapted to set a state of its output to a predetermined
state, from a plurality of states, in response to receiving a portion of the pulse.
The outputs of the detectors are coupled to output pins of the semiconductor circuit.
A tester is provided that is adapted to couple to the semiconductor output pins and
detect the state of the detector outputs. |